A jetpack compose preview demonstrating the effects of recomposition for a snapshot flow.

output.md

Output of LaunchedEffect(Unit) on 3 button clicks

collected value
collected value
collected value

Output of LaunchedEffect(someState) on 3 button clicks.

collected value
Recreating snapshot flow
collected value
collected value
Recreating snapshot flow
collected value
collected value
Recreating snapshot flow
collected value

Each click causes

collected value
Recreating snapshot flow
collected value

SnapshotFlowRecomposition.kt

@Preview
@Composable
private fun SnapshotFlowPreview() {
    var someState by remember { mutableStateOf("") }
    var someOtherState by remember { mutableStateOf("") }
    val onSomeStateChange: (String) -> Unit = { newState ->
        someOtherState = newState
    }

    // Replace this line with the commented one.
    LaunchedEffect(someState) { 
    // LaunchedEffect(Unit) {
        debug("SnapshotFlowPreview", "Recreating snapshot flow")
        snapshotFlow { someState }.collect {
            debug("SnapshotFlowPreview", "collected value")
            onSomeStateChange(it)
        }
    }

    Column {
        Text("Some state: $someState")
        Text("Other state: $someOtherState")
        Button(onClick = { someState = Random.nextInt().toString() }) {
            Text("change state")
        }
    }
}